[Qemu-devel] [PATCH 14/16] pc: Postpone adding ACPI and SMBIOS to fw_cfg

[Corey Minyard]

Postpone the addition of the ACPI and SMBIOS tables until after
device initialization.  This allows devices to add entries to these
tables.

Signed-off-by: Corey Minyard <cminy...@mvsita.com>
---
 hw/i386/pc.c | 38 ++++++++++++++++++++++++++++++--------
 1 file changed, 30 insertions(+), 8 deletions(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index dee409d..765c95e 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -607,8 +607,6 @@ static unsigned int pc_apic_id_limit(unsigned int max_cpus)
 static FWCfgState *bochs_bios_init(void)
 {
     FWCfgState *fw_cfg;
-    uint8_t *smbios_table;
-    size_t smbios_len;
     uint64_t *numa_fw_cfg;
     int i, j;
     unsigned int apic_id_limit = pc_apic_id_limit(max_cpus);
@@ -631,14 +629,8 @@ static FWCfgState *bochs_bios_init(void)
     fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)apic_id_limit);
     fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1);
     fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
-    fw_cfg_add_bytes(fw_cfg, FW_CFG_ACPI_TABLES,
-                     acpi_tables, acpi_tables_len);
     fw_cfg_add_i32(fw_cfg, FW_CFG_IRQ0_OVERRIDE, kvm_allows_irq0_override());
 
-    smbios_table = smbios_get_table(&smbios_len);
-    if (smbios_table)
-        fw_cfg_add_bytes(fw_cfg, FW_CFG_SMBIOS_ENTRIES,
-                         smbios_table, smbios_len);
     fw_cfg_add_bytes(fw_cfg, FW_CFG_E820_TABLE,
                      &e820_table, sizeof(e820_table));
 
@@ -1127,6 +1119,31 @@ void pc_acpi_init(const char *default_dsdt)
     }
 }
 
+struct pc_bios_post_init {
+    Notifier post_init;
+    void *fw_cfg;
+};
+
+/* Add the ACPI and SMBIOS tables after all the hardware has been initialized.
+ * This gives devices a chance to add to those tables.
+ */
+static void pc_bios_post_initfn(Notifier *n, void *opaque)
+{
+    struct pc_bios_post_init *p = container_of(n, struct pc_bios_post_init,
+                                               post_init);
+    uint8_t *smbios_table;
+    size_t smbios_len;
+
+    fw_cfg_add_bytes(p->fw_cfg, FW_CFG_ACPI_TABLES,
+                     acpi_tables, acpi_tables_len);
+    smbios_table = smbios_get_table(&smbios_len);
+    if (smbios_table)
+        fw_cfg_add_bytes(p->fw_cfg, FW_CFG_SMBIOS_ENTRIES,
+                         smbios_table, smbios_len);
+}
+
+static struct pc_bios_post_init post_init;
+
 FWCfgState *pc_memory_init(MemoryRegion *system_memory,
                            const char *kernel_filename,
                            const char *kernel_cmdline,
@@ -1196,6 +1213,11 @@ FWCfgState *pc_memory_init(MemoryRegion *system_memory,
         rom_add_option(option_rom[i].name, option_rom[i].bootindex);
     }
     guest_info->fw_cfg = fw_cfg;
+
+    post_init.fw_cfg = fw_cfg;
+    post_init.post_init.notify = pc_bios_post_initfn;
+    qemu_add_machine_init_done_notifier(&post_init.post_init);
+
     return fw_cfg;
 }
 
-- 
1.8.3.1